Malware Analysis Report

2024-09-22 21:47

Sample ID 240113-gj57msdgc8
Target 8C36F8A010E9781BDA4076852EFB05A7.exe
SHA256 2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b
Tags
oski discovery infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b

Threat Level: Known bad

The file 8C36F8A010E9781BDA4076852EFB05A7.exe was found to be: Known bad.

Malicious Activity Summary

oski discovery infostealer spyware stealer

Oski family

Oski

Downloads MZ/PE file

Checks computer location settings

Deletes itself

Reads user/profile data of web browsers

Loads dropped DLL

Checks installed software on the system

Accesses cryptocurrency files/wallets, possible credential harvesting

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Checks processor information in registry

Kills process with taskkill

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-01-13 05:51

Signatures

Oski family

oski

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-13 05:51

Reported

2024-01-13 05:53

Platform

win7-20231215-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"

Signatures

Oski

infostealer oski

Downloads MZ/PE file

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe

"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /pid 1268 & erase C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe & RD /S /Q C:\\ProgramData\\157427143777317\\* & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /pid 1268

Network

Country Destination Domain Proto
US 8.8.8.8:53 9entrevera.sa.com udp
AU 103.83.194.50:80 9entrevera.sa.com tcp

Files

\ProgramData\sqlite3.dll

MD5 e477a96c8f2b18d6b5c27bde49c990bf
SHA1 e980c9bf41330d1e5bd04556db4646a0210f7409
SHA256 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

\ProgramData\nss3.dll

MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

\ProgramData\mozglue.dll

MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-13 05:51

Reported

2024-01-13 05:53

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"

Signatures

Oski

infostealer oski

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe N/A

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\svchost.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe

"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /pid 3516 & erase C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe & RD /S /Q C:\\ProgramData\\700972825157161\\* & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /pid 3516

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k UnistackSvcGroup

Network

Country Destination Domain Proto
US 8.8.8.8:53 9entrevera.sa.com udp
AU 103.83.194.50:80 9entrevera.sa.com tcp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 1.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 50.194.83.103.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

C:\ProgramData\sqlite3.dll

MD5 e477a96c8f2b18d6b5c27bde49c990bf
SHA1 e980c9bf41330d1e5bd04556db4646a0210f7409
SHA256 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

C:\ProgramData\mozglue.dll

MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

C:\ProgramData\nss3.dll

MD5 0daa3bbae94b235bbaaf5b9c0c7ac521
SHA1 8d31fa29babe1c88c72c0c4e35e618b5bb850829
SHA256 3df4946812ab6d8b20d23b34538cbd8e8c264d60de7811294bc2f4b46ec6c9a6
SHA512 a3a259af84ed280266522ef3ed4486eea36b32a4d0a956f458dd4df6ede03b1dc34ae7e55d601f09eaedddc9646012fb4cd74eb410d4cadeb59888aeb3e85eb5

memory/4488-64-0x000001857F240000-0x000001857F250000-memory.dmp

memory/4488-80-0x000001857F340000-0x000001857F350000-memory.dmp

memory/4488-96-0x000001857F650000-0x000001857F651000-memory.dmp

memory/4488-98-0x000001857F680000-0x000001857F681000-memory.dmp

memory/4488-99-0x000001857F680000-0x000001857F681000-memory.dmp

memory/4488-100-0x000001857F790000-0x000001857F791000-memory.dmp